Arm for a chair



FIG. 1 is a perspective view showing the right side, top and front of an arm for a chair which forms my new design;

FIG. 2 is a perspective view showing the left side, top and rear thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a rear elevational view thereof.

The long broken lines in the figures indicate unclaimed environment and form no part of my design.

The short broken lines in the figures are understood to represent stitching. 

CLAIM The ornamental design for an arm for a chair, as shown and described. 